Dart board display device

ABSTRACT

A dart board display device includes a reflection board having with an inner polarization board connected thereto, an inner glass board connected to the inner polarization board and an inner circuit board connected to the inner glass board. A liquid crystal display board is connected to the inner circuit board and an outer circuit board is connected to the liquid crystal display board. An outer glass board is connected to the outer circuit board and an outer polarization board is connected to the outer glass board. The inner polarization board and the outer polarization board are both rotated 90 degrees so as to obtain light points on the liquid crystal display board.

FIELD OF THE INVENTION

[0001] The present invention relates to a dart board display deviceusing liquid crystal display which is cooperated with two polarizationboards which are rotated 90 degrees so as to obtain light points on thedisplay device.

BACKGROUND OF THE INVENTION

[0002] There are two conventional dart board display devices fordisplaying scores, one employs a light emitting diode and the otheremploys a liquid crystal display. The display device using lightemitting diodes can only display simple type of information. However,the light emitting diodes display the information clearly and brightlyso that the display device can be used in a dark place so that theplayers see the scores on the display device clearly even if the room isdark. On the contrary, the display device using liquid crystal displaycan provide vigorous and colorful motion pictures. Nevertheless, thedisplay device using liquid crystal display cannot light by itself sothat it cannot be used in a dark area so that when the dart game is usedin a dark area, the players have to come close to the display device tosee the information. FIG. 5 shows a display device using liquid crystaldisplay (LCD) includes a reflection board 10 and an inner polarizationboard 11 and an outer polarization board 110. Two glass boards 12 arerespectively connected to the two polarization boards 11, 110 and twocircuit boards 14 are connected to the two glass boards 12. A liquidcrystal display 13 is clamped between the two circuit boards 14 whichprovide electric voltage to arrange the dark points 131 of the liquidcrystal display 13 so that the information can be displayed by thearrangement of the dark points 131.

SUMMARY OF THE INVENTION

[0003] In accordance with one aspect of the present invention, there isprovided a dart board and comprises a frame having a body restrainedtherein and a display device is engaged with the frame. The displaydevice has a reflection board with an inner polarization board connectedthereto and an inner glass board is connected to the inner polarizationboard. An inner circuit board is connected to the inner glass board 33and a liquid crystal display board is connected to the inner circuitboard. An outer circuit board is connected to the liquid crystal displayboard and an outer glass board is connected to the outer circuit board.An outer polarization board is connected to the outer glass board. Theinner polarization board and the outer polarization board are bothrotated 90 degrees.

[0004] The primary object of the present invention is to provide a dartboard display device that employs a liquid crystal display board and tworeflection boards wherein the two reflection boards are rotated 90degrees so as to obtain light points on the liquid crystal displayboard.

[0005] The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0006]FIG. 1 is a plan view to show a dart board with a display deviceof the present invention;

[0007]FIG. 2 is a cross sectional view to show the display device of thepresent invention;

[0008]FIG. 3 is a perspective view to show the display device of thepresent invention with the two reflection boards being rotated 90degrees;

[0009]FIG. 4 is a cross sectional view to show the display device of thepresent invention, wherein two polarization areas are defined in each ofthe polarization boards, and

[0010]FIG. 5 is a cross sectional view to show a conventional displaydevice of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0011] Referring to FIGS. 1 to 3, the dart board includes a frame 20 anda body 21 is restrained in the frame 20. A plurality of separation ribs210 separate the body 21 into several score partitions. A display device30 of the present invention is engaged with the frame 20 and comprises areflection board 31 which has an active light source such as a lightemitting diode, and an inner polarization board 32 is connected to thereflection board 31. An inner glass board 33 has a first surface thereofconnected to the inner polarization board 32 and an inner circuit board35 has a first surface thereof connected to a second surface of theinner glass board 33. A liquid crystal display board 34 has a firstsurface thereof connected to a second surface of the inner circuit board35 and an outer circuit board 350 has a first surface thereof connectedto a second surface of the liquid crystal display board 34. An outerglass board 330 has a first surface thereof connected to a secondsurface of the outer circuit board 350 and an outer polarization board320 has a first surface thereof connected to a second surface of theouter glass board 330. It is to be noted that the inner polarizationboard 32 and the outer polarization board 320 are both rotated 90degrees as shown in FIG. 3 so as to obtain light points 341 on theliquid crystal display board 34. By the light points 341 on the liquidcrystal display board 34, the scores displayed on the display device ofthe present invention can be seen clearly in a dark room.

[0012] As shown in FIG. 4, the inner polarization board 32 and the outerpolarization board 320 each have two polarization areas 321 and 322between which 90 degrees polarization degrees are defined. In otherwords, the information on the liquid crystal display board 34 can beshown by light point mold or dark point mold on the display device 30.The inner polarization board 32 and the outer polarization board 320 areable to be slidable on the display device 30 so that the players cancontrol the display molds by moving the inner polarization board 32 andthe outer polarization board 320. A time control member such as an ICchip can be used to set a period of time during which the light points341 are on so as to save the electric energy of the display device 30.

[0013] While we have shown and described the embodiment in accordancewith the present invention, it should be clear to those skilled in theart that further embodiments may be made without departing from thescope of the present invention.

What is claimed is:
 1. A dart board comprising: a frame having a bodyrestrained in said frame, and a display device engaged with said frameand having a reflection board, an inner polarization board connected tosaid reflection board, an inner glass board connected to said innerpolarization board, an inner circuit board connected to said inner glassboard, a liquid crystal display board connected to said inner circuitboard, an outer circuit board connected to said liquid crystal displayboard, an outer glass board connected to said outer circuit board, andan outer polarization board connected to said outer glass board, saidinner polarization board and said outer polarization board being bothrotated 90 degrees.
 2. The device as claimed in claim 1, wherein saidinner polarization board and said outer polarization board each have twopolarization areas between which 90 degrees polarization degrees aredefined.